Add rbi for ActiveRecord::Sanitization::ClassMethods

lib/activerecord/all/activerecord.rbi

@@ -266,7 +266,6 @@ class ActiveRecord::Base
   extend ActiveRecord::Scoping::Default::ClassMethods # via ActiveRecord::Scoping::Default Concern inclusion
   include ActiveRecord::Scoping::Named # via ActiveRecord::Scoping#included hook
   extend ActiveRecord::Scoping::Named::ClassMethods # via ActiveRecord::Scoping::Named Concern inclusion
-  include ActiveRecord::Sanitization
   include ActiveRecord::AttributeAssignment
   include ActiveModel::Conversion
   include ActiveRecord::Integration

lib/activerecord/all/activerecord_test.rb

@@ -181,3 +181,9 @@ def test_activerecord_instance_methods
     T.assert_type!(relation.size, Integer)
   end
 end
+
+class ActiveRecordBaseTest
+  def sanitize_sql_test
+    ActiveRecord::Base.sanitize_sql(["where id IN ?", [1, 2, 3]])
+  end
+end

lib/activerecord/all/sanitization.rbi

@@ -0,0 +1,34 @@
+# typed: stict
+
+class ActiveRecord::Base
+  include ActiveRecord::Sanitization
+  extend ActiveRecord::Sanitization::ClassMethods # via ActiveRecord::Sanitization concern
+end
+
+# @see https://github.com/rails/rails/blob/eca6c273fe2729b9634907562c2717cf86443b6b/activerecord/lib/active_record/sanitization.rb
+module ActiveRecord::Sanitization::ClassMethods
+  sig { params(condition: T.any(T.nilable(String), Array)).returns(T.nilable(String)) }
+  def sanitize_sql_for_conditions(condition)
+  end
+  alias :sanitize_sql :sanitize_sql_for_conditions
+
+  sig { params(assignments: T.any(Array, Hash, String), default_table_name: String).returns(String) }
+  def sanitize_sql_for_assignment(assignments, default_table_name)
+  end
+
+  sig { params(condition: T.any(Array, String)).returns(String) }
+  def sanitize_sql_for_order(condition)
+  end
+
+  sig { params(attrs: Hash, table: String).returns(String) }
+  def sanitize_sql_hash_for_assignment(attrs, table)
+  end
+
+  sig { params(string: String, escape_character: String).returns(String) }
+  def sanitize_sql_like(string, escape_character = "\\")
+  end
+
+  sig { params(ary: Array).returns(String) }
+  def sanitize_sql_array(ary)
+  end
+end